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-   -   what tune give the best mpg? (

boomer 08-24-2013 06:12 PM

what tune give the best mpg?
I am currently running the 87 tune with msds off and I have seen 2 mpg better then with no tuner, which I'm happy with. :smileup: My question is for my road trip 1100 miles each way mostly interstate and some rolling 2 lanes roads, pulling a tandem axel enclosed trailer loaded at about 6000 lbs. What tune should run for best mpg? Keep in mind I usually have it about 5-7 mph over the posted limit. Have the Hemi and 3.55 gears in my 1500, was wondering if anyone has had a chance to experment for mpgs when pulling

boomer 08-28-2013 09:43 PM

Nevermind, I went and wieghed the truck and trailer today and Im at nearly 14000 pounds minus my truck 5500 I'm pulling 8500 and sitting almost on my back tires. Plenty of power up the hills im running at 37-3900 rpm and not losing a single mile an hour, but it handles like crap and I feel every bump... so I'm going to remidy that and borrow my dads diesel for this 18 hour road trip. Half of towing compasity is alot easier on stuff then full load.

MF2000 01-27-2014 08:37 PM

I've always had the best mpg with the highest 93 tune.

sunshdw 03-03-2014 01:43 PM

Unloaded I've done my best MPG's using the 87 performance tune (cheaper to fill too) and I always use the 91 tune when towing my trailer

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